Mean Time to Remediate (MTTR) is a critical KPI in vulnerability management as it indicates the efficiency and effectiveness of the remediation process. A lower MTTR suggests that the organization is more effectively managing vulnerabilities by resolving them in a timely manner. By highlighting MTTR in the report, the security team can show stakeholders the actual performance against established service-level objectives (SLOs), which can help in gauging the vulnerability management program's success and in decision-making for potential process improvements.